| abstract |
Disclosed herein is a novel group of carbonitride phosphors and light emitting devices which utilize these phosphors. In certain embodiments, the present invention is directed to a novel family of carbonitride-based phosphors expressed as follows: (1) Ca1-xAlx-xySi1-x+xyN2-x-xyCxy: A; (2) Ca1-x-zNazM(III)x-xy-zSi1-x+xy+zN2-x-xyCxy: A; (3) M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xyCxy: A; (4) M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xy-2w/3CxyOw-v/2Hv: A; and (4a) M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xy-2w/3-v/3CxyOwHv: A, wherein 0 < x < 1, 0 < y < 1, 0 ≤ z < 1, 0 ≤ v < 1, 0 < w < 1, x+z < 1, x > xy+z, and 0 < x-xy-z < 1, M(II) is at least one divalent cation, M(I) is at least one monovalent cation, M(III) is at least one trivalent cation, H is at least one monovalent anion, and A is a luminescence activator doped in the crystal structure. |